Detective Damien Seryph (Brian Krause) discovers the existence of a demonic cult that's connected to several mysterious murders around the city. During his investigation, he uncovers pieces of his past involving the cult and his forgotten childhood. In order to defeat the evil forces he's faced with, he gains unworldly powers to send the demons back to where they came from.

Detective Damien Seryph investigates a string of murders that connects to a group trying to bring forth the 4 King Demons of Hell. Damien's past connects him to those involved and will force him to become "The Demonologist".